Hey Steve.
I have three Clustered ONTAP systems. As you probably know, it is very different from 7-Mode, yet there are many similarities. It *is* useful to have a 7-mode background (although not necessary).
Have you looked through the Online Docs for 8.1.2 Cluster mode? All that is in there in their own sections. (File & protocol guide) https://library.netapp.com/ecmdocs/ECMP1136576/html/frameset.html
(SysAdmin Guide) https://library.netapp.com/ecmdocs/ECMP1136871/html/frameset.html
junction paths are where the individual volumes in ONTAP are placed. If I have volumes root (aka /),data, corpdata, exp and web, they might look like this
--->root (/) ---> data (/data) ---> corpdata (/data/corpdata) ---> exp (/exp) ---> web (/web)
From a client, I can mount/map to anywhere in the global namespace
https://library.netapp.com/ecmdocs/ECMP1147120/html/volume/create.html https://library.netapp.com/ecmdocs/ECMP1147120/html/volume/mount.html
Export-policies replace the /etc/exports file. You can define one or more policies that affect how volumes are mounted. I can have one policy that lists everything and assign it to all volumes or I can have many to fit different scenarios. (I use the latter). You typically host-match or some type, like 192.168.1.0/24 (to allow all hosts on the subnet) or 7.1.4.64/26 (for only the 63 hosts on this net) or even netgroups from NIS. An Export policy is created and then you put rules in the policy...
https://library.netapp.com/ecmdocs/ECMP1147120/html/vserver/export-policy/cr... https://library.netapp.com/ecmdocs/ECMP1147120/html/vserver/export-policy/ru...
Of course, the other big thing is pNFS with Clustered ONTAP. If you have clients that support it (i.e. RHEL6.2 and higher and some other Fedora kernels) you can turn it on and use it. pNFS separates the data and the meta-data paths. You can hit any node in the cluster for the meta-data and behind the scenes redirects you to the origination server for the data (i.e. direct data path) so you get a potential performance boost by not using the backend cluster network for data.
hope this helps.
By the way...8.1.2P1 has some very nice NFS fixes in it. we have seen issues vanish since the update two days ago (we were seeing unexplained issues daily!)
--tmac
*Tim McCarthy* *Principal Consultant*
Clustered ONTAP Clustered ONTAP NCDA ID: XK7R3GEKC1QQ2LVD RHCE5 805007643429572 NCSIE ID: C14QPHE21FR4YWD4 Expires: 08 November 2014 Expires w/release of RHEL7 Expires: 08 November 2014
On Thu, Feb 28, 2013 at 8:43 AM, Steve Losen scl@virginia.edu wrote:
Hi Folks,
Can anyone point me to some good documentation for the above? I've looked on the Netapp Support site at the man pages and admin guides and they cover the command options, but I haven't found anything explaining how all this stuff works together. I understand that the purpose is to provide a unified namespace, but I would like more information about what is legal/illegal, recommended practices, etc.
I there a white paper on this?
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support
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